I apologize if my previous response didn't meet your expectations. Let's reassess the options:
A - Details about setting and conflict.
B - A general statement about change.
C - A specific character development event.
D - A broad philosophical idea.
Given this context, C might be seen as the best example of a central idea since it illustrates a transformation of perspective within the story, highlighting how the players' understanding of their coach evolves. Thank you for the clarification, and I appreciate your understanding!